ZeroSubset

using System;
using System.Linq;

class ZeroSubset
{
    static void Main()
    {
        string ConsoleString = Console.ReadLine();
        string[] numbersLikeString = ConsoleString.Split(' ');
        int[] numbers = new int[5];

        for (int i = 0; i < 5; i++)
        {
            numbers[i] = int.Parse(numbersLikeString[i]);
        }

        if (numbers.Sum() == 0)
        {
            Console.WriteLine("0 + 0 + 0 + 0 + 0 = 0");
            return;
        }

        long sum = 0;
        string result = "";
        bool isZeroSubset = false;


        for (int combination = 1; combination < 32; combination++)
        {
            int[] bits = new int[5];

            for (int i = 0; i < 5; i++)
        {
                bits[i] = (combination >> i) & 1;
                sum += numbers[i] * bits[i];
                if (bits[i] == 1)
                {
                    result += numbers[i] + " + ";
                }
        }

            result = result.Trim('+', ' ');
            result += " = " + sum;

            if (sum == 0)
            {
                Console.WriteLine(result);
                isZeroSubset = true;
            }

            result = "";
            sum = 0;
        }

        if (isZeroSubset == false)
        {
            Console.WriteLine("no zero subset");
        }
    }
}